. State route; County route; Former military route; Other former route; Other unnumbered route(Actual county route shields are usually identical to state shields; see the FAQs for how routes are classified in the listings below.
Also, in many browsers letting your mouse linger over a route number graphic will help you decipher it.)

Former route (no longer in numbered state or county system)

Future route

Routes are generally listed in numerical order, with some exceptions to group portions of the same road, or its former alignments, with different names and/or numbers. For lists ordered differently (alphabetical by name, or by former route number):

JN Main Street and West Main Street in Wailuku, south to JN Honoapiilani Highway at Kahookele Street; four-lane divided; county-maintained in 1960s

0.3miles

FormerBY-PASS

See listings below for By-Pass and former By-Pass Waiale Drive

(part)

HonoapiilaniHighway

JN High Street at Kahookele Street in Wailuku, south then west (via 318 feet-long Olowalu Tunnel northwest of Papawai Point) then north through Lahaina, then northeast to JN Kahekili Highway at Honohokau Bay; highway through Lahaina has four lanes; first 1.9 miles, in Wailuku north of Waiale Drive, county-maintained in 1960s; at northwestern end of route, 10.4 miles used to be county route 300 until 1968; in addition to Lower Honoapiilani Road (see listing below), there are old Honoapiilani Highway alignments visible inland from the existing alignment, both east of the Olowalu Tunnel (best viewed from the scenic turnout east of the tunnel), and west of the tunnel (several miles now privately-owned, but open to non-motor vehicle traffic); named for several west Maui bays ("hono-") within domain of 16th century chieftain Piilani

35.6miles

In addition to the plans underway to construct an eastern bypass of Lahaina (see following listing), there were longer-range plans (apparently on indefinite hold) to also widen to four lanes and realign the highway southeast of Lahaina to Maalaea (or at least to the two-lane Olowalu Tunnel). Much of the highway would be moved inland to keep shore erosion from undercutting the roadbed, avoid occasional closures from high waves, and free up the existing right-of-way for a proposed new shoreline park.

JN Hokiokio Place south of Lahaina, north to JN Keawe Street in Lahaina; upon completion, to extend from JN Honoapiilani Highway south of Lahaina at mile 17.65, north to JN Honoapiilani Highway north of Lahaina at mile 26.82; initially built as two-lane road with divided segments and climbing lanes in places, but ultimately to be four-lane divided highway, with mostly at-grade crossings; ground was broken in April 2009 on phase 1A of project, between Lahainaluna Road and Keawe Street, which opened March 2013; next phase, south of Lahainaluna Road to Hokiokio Place, completed December 2013; route appears to have no route number signage, except spurious signage at Lahainaluna Road interchange (perhaps reflecting ultimate plan to move onto Lahaina Bypass once completed); three additional phases, to complete bypass, planned but with no projected completion dates

2.5miles&nbsp(+ 6.5milesunbuilt)

Former

LowerHonoapiilaniRoad

JN Honoapiilani Highway north of Kaanapali, near mile 26, to JN Honoapiilani Highway at Honokahua, near mile 31; former routing of until bypassed by current alignment in 1986; Hawaii DOT planning documents indicate a former route 30 alignment running closer to the shoreline than the current one, and there is a old route 30 milemarker 29 on Lower Honoapiilani Road

5.5miles

About a half-mile of the road near its northern end, west of D.T. Fleming Beach County Park, is now CLOSED and grassed-over for a golf course.

(part)

KahekiliHighway(part)

JN Honoapiilani Highway at Honokohau Bay, northeast to JN Kahekili Highway near Keawalua; part of county route 340 (and before then route 33, 330 and/or 34) until sometime after 1981, and perhaps until after 1994 (as suggested by a Hawaii DOT map from that year); shown on many maps as part of Honoapiilani Highway, but Hawaii DOT records show this segment as part of Kahekili Highway, as it was when it was county-maintained

5.8miles

Narrow and winding, with at least one one-lane bridge.

NorthKiheiRoad

JN Honoapiilani Highway north of Maalaea Harbor, east to JN Piilani Highway and Mokulele Highway; once signed as part of , even while listed in state highway log as ; part west of South Kihei Road in Kihei was county highway until late 1960s; remaining 0.1 mile of route added by April 1981 as part of Piilani Highway, before transferred to North Kihei Road

JN Mokulele Highway and Piilani Highway in Kihei, south to Wailea Ike Drive in Wailea, connecting to ? Wailea Alanui Drive south toward La Perouse Bay (see below); first segment opened to Kilohana Drive April 1981; extended to Wailea Ike Drive June 1990; may be further extended (see below); named for 16th century Maui chieftain Piilani

7.2miles

NO ROAD CONNECTION BETWEEN THE SOUTHERN END OF IN WAILEA AND THE EASTERN COUNTY-MAINTAINED SEGMENT OF THE PIILANI HIGHWAY THROUGH UPCOUNTRY EAST MAUI. See the item for ? Makena Road (FORMER) below for more information.

See also the following listings for ? Wailea Alanui Drive, Makena Alanui Road, and Makena Road (part) for an open (though sometimes narrow and rough) road from the current south end of in Wailea to La Perouse Bay on the southwestern corner of Maui.

Hawaii DOT plans (subject to funding availability) to build a new connection between and , to replace the Makena Road link closed about two decades ago (see below). See the listing for future on table 2, a planned new highway between at Kaonoulu Street in Kihei (well north of 's southern end in Wailea), and JN near Pukalani, about 16 miles north of the western end of , to connect science facilities in Kihei with others atop the Haleakala volcano. Another option, which was earlier explored by Hawaii DOT, and which still has local supporters, would extend south of Wailea past Makena, then northeast and uphill to join at its junction with . These options are not mutually exclusive.

County

See listings below (after Hana Highway listings)

Former(part)

SouthKiheiRoad(part)

JN North Kihei Road Piilani Highway, south to JN ? at Kalama Park; bypassed in 1981 by Piilani Highway

3.9miles

The information I have on former routing(s) is conflicting. The preceding South Kihei Road segment is the one I am most confident was a former alignment of route 31. Hawaii DOT planning documents from the 1960s indicate that route 31 was a designated state route, open along the coast down to Kalama Park, but south of there route 31 was shown only as a proposed route southeast from the coast connecting to at Ulupalakua in upcountry east Maui. Other information suggests that pending that proposed inland (re-)routing, route 31 extended further south along the coast, perhaps down to and including the now-closed Makena Road (FORMER) connection to , or even (less likely) LaPerouse Bay.

Another complication is that parts of the original coastal road south from Kihei to Wailea and Makena were closed and/or bypassed by Okolani Drive, Wailea Alanui Drive, and Makena Alanui Road, to make way for new resorts along the shoreline. It is particularly unclear whether those roads were ever part of route 31, but a set of Maui County planning maps suggest that route 31 followed at least part of Wailea Alanui Drive, down to and perhaps including Makena Road (FORMER), via Kaukahi Street, the segment below of still-open (Old) Makena Road, and a part of (Old) Makena Road later absorbed by Makena Alanui Road. The former (Old) Makena Road segment was later bypassed by Makena Alanui Road, but it is unclear when that happened, or whether the route 31 designation ever shifted to the new Makena Alanui alignment before the designation was removed altogether for the roads along the coast between Kihei and Makena.

Here's a rundown on the possible former 31 routings south of Kalama Park shown on various Maui or Hawaii statewide maps I have reviewed, which include various permutations of the segments shown below (the preceding South Kihei Road segment north of Kalama Park is common to all pre-1981 routings):

1976 Maui County planning map: includes South Kihei Road (both segments), South Kihei Road/(Old) Makena Road, Makena Alanui Road, and Makena Road segments all the way to LaPerouse Bay; does not include Makena Road (FORMER) to Ulupalakua.

1981 Maui County numbered county routes maps: include at least Wailea Alanui Drive, Kaukahi Street, part of South Kihei Road/(Old) Makena Road, part of Makena Alanui Road, and Makena Road (FORMER) segments, and probably also part of Piilani Highway, plus Kilohana Drive, South Kihei Road (second segment below), and Okolani Drive segments. (These maps show all of the numbered county routes, but do not include the foregoing segments among them, suggesting that those segments were part of a numbered state route.)

1969 and 1975 Rand McNally Hawaii foldup maps: include only first South Kihei Road segment below, show route 31 as ending in Keawakapu

While the listings below discuss various possible segments of former "state" route 31, it is possible that the route 31 designation for some or all of them was made by Maui County rather than Hawaii DOT, and that they always were (as is now the case) county rather than state roads. This is particularly likely for segments built, or incorporated into route 31, after the late 1960s when Hawaii's combined state and county route number system was divided into discrete state and county networks. None of the Hawaii DOT annual reports or other historical records I have reviewed indicate that the state constructed or maintained any of the following segments, particularly the ones most recently built (such as Wailea Alanui Drive and Makena Alanui Road).

Just after statehood in 1961, a Hawaii DOT plan showed a "proposed new route" 310 (perhaps on new alignment) following the coast from Kihei to Keawakapu, then turning inland on a new alignment toward the southeast to connect to what is now Piilani Highway at Ulupalakua. Part of this proposal evolved into the new Piilani Highway decades later. The plan also showed a "possible future highway" route 321, running along the coast (on unspecified alignment) 10.6 miles from Keawakapu to La Perouse Bay. The latter proposal disappeared from later Hawaii DOT plans, though it may have resurfaced as one of the above possible routings.

Former?(part)

SouthKiheiRoad(part)

JN ? South Kihei Road at Kalama Park, south to JN ? South Kihei Road and Kilohana Drive in Keawakapu; bypassed in 1981 by Piilani Highway; see note above on former routings for more information

1.8miles

Former?(part)

SouthKiheiRoad(part)

JN ? South Kihei Road and Kilohana Drive, south to JN ? South Kihei Road/(Old) Makena Road and Okolani Drive; bypassed in 1990 by Piilani Highway; see note above on former routings for more information

0.3miles

Former?(part)

SouthKiheiRoad(part)/(Old)Makena Road(part)

JN ? South Kihei Road and Okolani Drive, south 0.2 miles to end of South Kihei Road at Keawakapu Beach Park, then resuming as part of Makena Road at Polo Beach Park, 2.1 miles south (via 0.5 miles of ? Makena Alanui Road) to end of pavement north of the Maui Prince resort, then resuming yet again as Makena Road south of the Maui Prince to JN Makena Alanui Road and Makena Road north of Makena State Park; used to be continuous road along the shoreline, until portions of road were taken over for several new resorts (after development of the new inland through routes ? Wailea Alanui Drive and Makena Alanui Road); this segment was fully open (though most or all of it was narrow and unpaved) through at least the mid-1970s, but dates of later partial closures or other changes unknown; fragments of old road remain in public use, largely as beach accesses; this part and others of (Old) Makena Road were once named Keoneoio Road; see note above on former routings for more information

2.6miles

(+ 1.6milesclosed)

Former?(part)

KilohanaDrive

JN Piilani Highway Mapu Place Kihei, southwest to JN ? South Kihei Road near Keawakapu; may have been part of route 31 between 1981 and 1990, after Piilani Highway was built south to Kilohana Drive, until that highway was extended further south to Wailea Ike Drive; see note above on former routings for more information

0.7miles

Former?(part)

OkolaniDrive(part)

JN ? South Kihei Road and South Kihei Road/(Old) Makena Road near Keawakapu, southeast to JN ? Wailea Alanui Drive Okolani Drive in Wailea; one 1975 unofficial map indicates this segment was part of Wailea Alanui Drive (but was not part of route 31); part of inland rerouting of road along south Maui coast, after closures of parts of ? South Kihei Road/(Old) Makena Road segment listed above; see note above on former routings for more information

0.3miles

Former?(part)

WaileaAlanuiDrive(part)

JN ? Okolani Drive Wailea Alanui Drive, south to ? Makena Alanui Road at Kaukahi Street; divided highway; connects to current south end of Piilani Highway via short connection over Wailea Ike Drive; part of inland rerouting of road along south Maui coast, after closures of parts of ? South Kihei Road/(Old) Makena Road segment; see note above on former routings for more information

1.8miles

Former?(part)

KaukahiStreet(part)

JN ? Wailea Alanui Drive and Makena Alanui Road Kaukahi Street south of Wailea, west to ? South Kihei Road/(Old) Makena Road; may have been temporarily part of inland rerouting of road along south Maui coast, after closures of parts of ? South Kihei Road/(Old) Makena Road segment, and before completion of ? Makena Alanui Road and closure of part of Old Makena Road in front of Maui Prince resort; see note above on former routings for more information

0.2miles

Former?(part)

MakenaAlanuiRoad

JN ? Wailea Alanui Drive south of Wailea at ? Kaukahi Street, south to ? Makena Road; this segment includes about 0.5 miles of what was once Makena Road; part of inland rerouting of road along south Maui coast, after closures of parts of ? South Kihei Road/(Old) Makena Road segment; unnumbered county road, with no trace of any former route number signage; see note above on former routings for more information

2.6miles

Former?(part)

MakenaRoad(FORMER)

JN ? Makena Alanui Road in Makena, between Wailea and Makena golf courses, east to JN Piilani Highway Kula Highway at Ulupalakua in upcountry east Maui; very rough unpaved private road, that had been used by public as shortcut between south Maui coast and upcountry east Maui; closed to public use, due to liability concerns, ca. 1984; 1.5 miles of road (probably at eastern end) may have been county road, recommended by Hawaii DOT in 1967 to be transferred to state highway system, and incorporated in proposed (and never built) permanent connection between and ; see note above on former routings for more information

~ 5miles

ROAD NOW CLOSED TO GENERAL PUBLIC. Some current maps still erroneously show this road, or some other road connecting the south end of Piilani Highway in Wailea to JN Piilani Highway Kula Highway at Ulupalakua (actually a long-abandoned proposed extension of ). The best existing connection between Makena and Ulupalakua requires a lengthy detour via Kahului, adding about an hour to your journey.

Former?(part)

MakenaRoad(part)

JN ? Makena Road and Makena Alanui Road in Makena, south to end of pavement at La Perouse Bay; unnumbered county road, with no trace of any former route number signage; see note above on former routings for more information

JN Hobron Street in Kahului, west to JN Main Street at border between Kahului and Wailuku; named for Queen Kaahumanu, Kamehameha the Great's favorite wife, and one of the most influential women in Hawaiian history

2.5miles

(part)

MainStreet

JN Kaahumanu Avenue at border between Kahului and Wailuku, west to JN High Street and West Main Street in Wailuku; part of segment, west of , was county-maintained in 1960s

0.4miles

BY-PASS

FormerBY-PASS(part)

WellsStreet

JN High Street in Wailuku, east to JN BY-PASS Waiale Drive; branches from to bypass part of Main Street in downtown Wailuku; not identified in any Hawaii DOT planning documents I am aware of, but indicated by brand-new (added between late 2001 and mid-2005) route 32 junction marker with "BY-PASS" banner (no other signage to indicate where the new bypass ends); former routing of BY-PASS indicated by several rusted old cutout-style route shields with "BY-PASS" banners, probably from the 1960s (shields now gone, but rest of sign assemblies remain)

0.4miles

FormerBY-PASS

KimpopoStreet

JN Main Street in downtown Wailuku, south one block to JN BY-PASS Wells Street; bypasses part of Main Street in downtown Wailuku; not identified in any Hawaii DOT planning documents I am aware of, but was indicated by one or two rusted old cutout-style route shields with "BY-PASS" banners, probably from the 1960s (shields now gone, but rest of sign assemblies remain)

JN North Market Street in downtown Wailuku, east to JN BY-PASS Central Street; not identified in any Hawaii DOT planning documents I am aware of, but indicated by one or two rusted old cutout-style route shields with "BY-PASS" banners, probably from the 1960s (shields now gone, but rest of sign assemblies remain); I did not spot this route until route shields disappeared, but I am guessing that the "by-pass" route number was 33, there being no other number available from the main routes in Wailuku that was not assigned to some other Wailuku "by-pass" route

0.2miles

FormerBY-PASS(part)

CentralStreet

JN BY-PASS Mill Street in Wailuku, south to JN Main Street; see preceding listing for more route information

0.2miles

FormerBY-PASS

EastMainStreet

JN Waiehu Beach Road and Kahului Beach Road, west to JN Main Street BY-PASS Waiale Drive in Wailuku; only route sign or marking a rusted 1960s-era cutout-style route shield at bottom of exit ramp from eastbound Main Street, with "BY-PASS" banner (shield now gone, but rest of sign assembly remains); shown as state route 34 (without "by-pass" designation) in 1967 Hawaii DOT planning document, which recommended its removal from state and Federal-aid highway systems

1.4miles

Former(part)

FormerBY-PASS(part)

WaialeDrive(part)

JN BY-PASS Wells Street Waiale Drive in Wailuku, north to JN Main Street BY-PASS East Main Street; see preceding item for route history

0.1miles

Former(part)

WaialeDrive(part)

JN BY-PASS Waiale Drive and BY-PASS Wells Street, south to JN Koa Drive at Wainu Road; shown in 1967 Hawaii DOT planning document, which recommended its removal from state and Federal-aid highway systems

0.4miles

Formerproposed?(part)

KoaDrive

JN Waiale Drive at Wainu Road in Wailuku, west to JN High Street; shown in 1967 Hawaii DOT planning document, which recommended its removal from state and Federal-aid highway systems

0.3miles

CLOSED (unclear whether road ever existed, or was merely a proposed road that was never built)

HanaHighway(part)

JN Kaahumanu Avenue in Kahului, east to JN Hana Highway and Kaupakalua Road in Ha'iku; four-lane divided highway east of JN Haleakala Highway, with 55mph speed limit between and Dairy Road; part of segment, east of Paia, originally county-maintained; this and other parts of the Hana Highway used to be, and sometimes still is, called the "Hana Belt Road"

In July 2006, a temporary "mini-bypass" of Paia was opened. It is privately-owned (by a large local landowner, through whose holdings the road passes), one-way eastbound and one-lane, and only during the afternoon rush, for commuters from eastbound west of Paia to turn south onto Baldwin Avenue south of Paia. Commercial traffic is not allowed. This is intended to relieve chronic afternoon rush congestion through Paia. A full-time permanent bypass for all Hana Highway through traffic in both directions remains a long-range option under active consideration, but don't hold your breath waiting for that to happen.

(part)

HanaHighway(part)

JN Hana Highway and Kaupakalua Road in Ha'iku, east to JN Keawe Place Hana Highway in Hana; most of this segment was originally county-maintained, until added to state highway system in 1969; originally part of route 36; eastern end of this segment, south of JN Uakea Road, may have been part of route 310 in 1960s

34.4miles

This part of the Hana Highway, along with part of (including part or all of the Hana Highway segment listed below, at least as far south as the Koukouai Bridge in Kipahulu at mile 40.66), is listed on the National Register of Historic Places, and was also designated in 1999 as a National Millenium Legacy Trail.

Winding, narrow road with hundreds of curves and more than three dozen one-lane bridges. Expect to average 15 mph or less (especially if you stop for the abundant photo opportunities).

Also, weight restrictions to protect the many historic bridges on this route (as well as the even more severe restrictions on , the only other road to Hana) limit truck traffic to and from east Maui.

Former?
(part)

Ha'ikuBeltRoad

JN Hana Highway east of mile 1, east to JN Hana Highway west of mile 2 at Punaiwa Road; may have been part of old routing of Hana Highway (before September 1965 realignment and straightening of Kakipi Gulch section at western end of ), and of route 36

~ 1miles

Unpaved. May now be private road, closed to public.

Former?
(part)

UlalenaLoop

JN Hana Highway east of mile 2, east to JN Hana Highway west of mile 3; see preceding item for more information on route history

1.2miles

Former?
(part)

UakeaRoad(part)

JN Hana Highway in Hana, south to JN Keawe Place Uakea Road near Hana Bay wharf; segment shown as part of route 360 in 1963 Hana Highway improvement plan; unclear whether this was signed as part of route 360 at that time, or after route was later added to state highway system; no remnants of any old route signage

0.9miles

(part)

KeawePlace

JN Hana Highway in Hana, two blocks east to Hana Bay wharf

0.5miles

The following two route segments are listed in reverse milemarker order, for continuity with the preceding Hana Highway listings. ends in Hana at mile 51.8, as the Hana Highway, and begins about 35 miles to the west at mile 15.1, as the Piilani Highway.

County(part)

HanaHighway(part)

JN Hana Highway at Keawe Place in Hana ( mile 51.8), south through Kipahulu unit of Haleakala National Park, to JN Piilani Highway at Kalepa Gulch ( mile 38.55); no route shields, but some signs indicate 31 route number, while many milemarkers show 360 route number; may originally have been part of route 36

Much of road (especially east of Kaupo) is very winding and narrow, with one-lane 5mph blind curves. Night driving is not recommended. Several miles near Kaupo are unpaved, may be impassable when wet, and generally are off-limits to rental cars.

(part)

HaleakalaHighway(part)

JN Hana Highway in Kahului, east to JN Haleakala Highway Keolani Place and Dairy Road; named for the Haleakala ("house of the sun") volcano dominating east Maui; originally county-maintained segment of Federal-aid route 37, and added to state highway system sometime after the late 1960s; once was signed as route 396

0.3miles

(part)

KeolaniPlace(part)

JN Haleakala Highway and Dairy Road in Kahului, east to end of state highway, 400 feet west of intersection with Palapala Drive; Keolani Place continues to Kahului Airport as unnumbered road; added to state highway system sometime after the late 1960s; once was signed as route 396

0.2miles

Former

FormerMilitary

Formercounty?

HaleakalaHighway(part)

JN Haleakala Highway and Keolani Place, and Dairy Road in Kahului, passing south of Kahului Airport, east to JN Haleakala Highway Hana Highway; originally state-maintained Federal-aid highway, except 0.7 miles in middle of this segment which was Federal-aid highway under U.S. Department of Defense jurisdiction; removed from state highway system in late 1960s; may have become at that time; was not in numbered county highway system in 1981, unclear whether middle of this segment remains under Defense Department control, but it is open to the general public

2.1miles

(part)

HaleakalaHighway(part)

JN Haleakala Highway Hana Highway east of Kahului Airport, east to JN Kula Highway and Haleakala Highway near Kula (see Table 2 for remainder of Haleakala Highway); westernmost mile of this segment upgraded to four-lane divided highway March 2004; next 4.5 miles to the east (to JN Old Haleakala Highway west of Pukalani) three lanes, with the middle lane normally eastbound but converted to westbound during the morning rush; conversion of that segment to four-lane divided planned to begin in 2006, and completed by 2008; northern bypass of Old Haleakala Highway in Pukalani completed September 1993; part of segment, between JN Upper Division Road and JN Old Haleakala Highway west of Pukalani, used to be multiplexed with route 40 and/or 400; western part of bypass has a stray route 444 milemarker, suggesting part of the bypass might have been temporarily designated as route 444 pending the later completion of rest of the bypass

7.7miles

See listings on table 2, beginning with , for the rest of the Haleakala Highway.

Former(part)

OldHaleakalaHighway

JN Haleakala Highway west of Pukalani, east through down Pukalani to JN Haleakala Highway; bypassed by newer segment of JN Haleakala Highway in September 1993; some old route 37 signage remains, at JN Makawao Avenue; part of segment west of used to be multiplexed with route 40 and/or 400

1.8miles

(part)

KulaHighway

JN Haleakala Highway east of Pukalani, south to JN Piilani Highway ? Makena Road (FORMER) at Ulupalakua; portion between northernmost and southernmost junctions with Lower Kula Road completed on new alignment April 1964; southernmost 5.0 miles, south of access road to Kula Hospital, originally was part of county-maintained Federal-aid route 370, until added to state route 37 in late 1960s

JN Kula Highway Anuhea Place south of Pukalani, roughly parallel to Kula Highway along west side, then crossing over to east side, then back to west side, then resuming on east side (after dead-end on west side, and 0.1 mile interruption where Kula Highway was built over old Lower Kula Road alignment, part of which reportedly still exists but is barricaded and overgrown), until finally ending at JN in Kula just north of JN Kekaulike Avenue; former route 37 alignment, until completion of Kula Highway on mostly new alignment in April 1964

6.3miles

Rough pavement in places. About 0.1 miles in middle of segment CLOSED where it was overbuilt by newer Kula Highway alignment, requiring a little backtracking on Kula Highway to continue on remainder of Lower Kula Road.